Baghdad, Dec 2, SPA -- At least five mortar rounds explodedin central Baghdad on Thursday, including two in the GreenZone, the enclave that houses Iraq's interim administrationand several foreign embassies. Witnesses reported at leastone person was killed and several wounded. Thick smoke rose from the sites of the Green Zone blasts,and sirens blared across the fortified area. Two U.S. BlackHawk helicopters arrived and landed within minutes of thedetonations, which bore the distinctive sound of mortarstrikes. A few minutes later, more shells landed on the other sideof the Tigris River, sending U.S. soldiers and Iraqisrunning for cover. One round struck near a mobile phone office in theal-Arasat neighborhood, killing one person and woundingthree, according to police Lt. Muhsin Khazim. Witnessesalso reported people were wounded in the other blastsaround Baghdad, but the number of casualties wasn't known. A U.S. military spokesman confirmed multiple explosions incentral Baghdad between 10:15 a.m. and 10:55 a.m.(0715-0755 GMT) but had no details. Last week, a mortar attack killed four employees of aBritish security firm and wounded at least 12 in the GreenZone, which houses the U.S. Embassy in Baghdad.--SPA1252 Local Time 0952 GMT www.spa.gov.sa/221401